Lock knot



June 2, 1959 Filed Ju'ly 1, 1955 LOCK KNOT Roland Johnson,Drummondville, Quebec, Canada, assignor to Dominion Textile Company,Limited, Montreal, Quebec, Canada, a corporation of Canada ApplicationJuly 1, 1955, Serial No. 519,588 2 Claims. (Cl. 87-12) The presentinvention relates to the manufacture of nets and more particularly to animproved knot formation.

In the making of netting, a plurality of strands or lengths of cord ortwine are interconnected at regularly spaced apart intervals by knotformations so as to form the meshes of the net.

It is important that the knots used for this purpose are of suchformation that they will not slip, particularly when the cord or twinefrom which the netting is made is of a synthetic nature, for example,nylon or the like. it is also important that the lengths away from eachknot are held in a symmetrical pattern so that there will be no tendencyfor the knot to twist or fold.

It is usual to make such knots as left and right hand formations inalternate rows of the net so that a general twist will not be impartedto the twine during the knotting operation.

Accordingly, the present invention is an improved form of a knotparticularly adapted for interconnecting adjacent lengths of flexiblecord in a netting construction.

More specifically, the present knot formation cornprises a first spiralloop in one of the lengths with portions of the length continuing fromthe loop in opposite directions, and in the other length an undulatingformation having three alternate bights with the shanks of the bightsindividually and in sequence passing through the rst loop, over a portonof the length forming the loop and one of the length portions extendingaway frm the loop, back through the loop around the length forming theloop and again passing through the loop, over a portion of the lengthforming the loop and the other of the lengths extending away from theloop, and finally back through the loop in a direction opposed to therst loop entry. With this arrangement, the undulating formation of theportion of the second length forming the bight intertwines about thefirst loop so that when the knot is tightened, all length portionsleading from the knot are retained in a substantial symmetrical orderand there is no slippage in any direction.

Having thus generally described the nature of the invention, particularreference will be made to the accompanying drawings wherein there isshown by way of illustration diagrammatic Views illustrating theformation of a knot in accordance with the invention, and in which:

Figure 1 is a front View of a portion of a netting construction with theadjacent lengths of cordage interconnected by knots having a formationaccording to the invention.

Figure 2 is an enlarged detail view showing the knot in untightenedcondition, illustrating more clearly the knot formation for a left handknot.

Figure 3 is a view corresponding to Figure 2 showing the knot formationas it would appear for a right hand knot.

Figures 4 and 5 show the knot formations of Figures nited States Patat 2and 3 in enlarged detail as they would appear when tightened.

With particular reference to Figures 2 and 4 of the drawings, whichrefer to the left hand knot, by way of example, and with reference toFigure 1 showing a portion of a netting construction using such knots,the netting consists of adjacent lengths of exible cord or twine whichare interconnected at regularly spaced apart intervals by knotformations as illustrated.

In the construction shown, starting from the top row, one of the cordlengths is indicated at 10, while the other cord length is indicated at12 with the first row of knots being left hand knots indicated at 14,the second row being right hand knots indicated at 16, the third rowagain left hand knots indicated at 14 and so on.

In each of the knot formations, shown in Figure 2 for the left hand, oneof the lengths, say 10, is rst formed into a spiral loop 20 havingportions of the length 22, 24 extending away from the loop in oppositedirections. The other length 12 follows an undulating formation havingthree alternate bights 26, 28, 30, the Shanks or legs of whichintertwine the first loop in the following manner. The length 12 passesfirst down through the loop in one direction and around the portion ofthe length 10 forming the loop and a portion of the length 22 extendingaway from the loop to form the bight 26. lt is then passed back throughthe loop in the length 10 and around the portion 10 forming the loop toform the bight 28; it then passes back through the loop around theportion of the length 10 forming the loopand the length portion 24extending away from the loop to form the bight 30; finally, it passesback down through the loop formed in the length 10 at the side opposedto its first entry. When this undulating formation is tightened, thebights 26, 30 come together at the top of the loop with the bight 28between the bights 26, 30 and at the bottom of the loop presenting theformation shown in Figure 4. This maintains the length portions 22, 24and the portions 32, 34 of the length 12 in their symmetricalarrangement extending away from the knot. The length portions extendingaway from the knot in all directions are retained at substantial rightangles so that the meshes formed between the adjacent lengths aresubstantially square in formation.

As will be appreciated, by reference to Figures 3 and 5, this formationis repeated in a right hand knot but in the opposite direction so thateach alternate row of knots tends to twist the cord slightly in oppositedirections thereby neutralizing any twist imparted to the nettingconstruction during the knotting operations.

I claim:

l. A knot adapted for interconnecting adjacent lengths of exible cord ina netting construction comprising, a first spiral loop in one of saidlengths with portions of said length continuing from said loop inopposite directions, and in the other length an undulating formationhaving three alternate bights with the Shanks of said bightsindividually and in sequence passing through said rst loop, over aportion of said loop and one of said length portions extending away fromsaid looppback through said loop around the length forming said loop andagain passing through said loop, around a portion of said length formingsaid loop and the other of said lengths extending away from said loop,and finally back through the loop in a direction opposed to said firstloop entry whereby said undulating formation when tightened causes f allthree bights to bind and return said first loop and all length portionsleading from the knot in substantially symmetrical order.

2. Netting constructed of spaced lengths of flexible cord or twineinterconnected at regularly spaced apart intervals therealong by knotformations which include one leading from the loop respectively, theportions of said length in a spiral loop formation with portions of thesaid other length leading from said undulating formation one lengthextending from thefloop in opposite directions emerging from said loopat opposite sides thereof. and the other length intertwined about saidrst. loop in an undulating formation having three alternate, bghts 5References Cited in the fue of this Patent with the length portionforming said bights surrounding in sequence the said one length formingthe loop and UNITED STATES PATENTS one of the length portions leadingfrom the loop, the 2,162,115 Pauls Iune 13, 1939 said one length formingthe loop, and the said one length 2,641,951 Sonnberger June 16, 1953forming the loop and the other of said length portions 10

